tcgetwinsize.c\termios\src - musl - musl - an implementation of the standard library for Linux-based systems

#include <termios.h>
#include <sys/ioctl.h>
#include "syscall.h"
int tcgetwinsize(int fd, struct winsize *wsz)
{
	return syscall(SYS_ioctl, fd, TIOCGWINSZ, wsz);
}